Features All-round protection features: reverse discharge of the battery, undervoltage, reverse connection protection. etc. Use advanced MPPT charging technology to automatically track the maximum power point, 10%~30% higher than the charging efficiency of ordinary controller. Adjustable charging and discharging control parameters, adjustable load mode. Intelligent PWM charging mode with automatic temperature compensation. Intuitive LCD display and graphic symbol, simple control buttons. Specification: Model: T40A Charging Mode: MPPT + PWM System Voltage: 12V/24V Auto Maximum current: 40A Load loss system: ≤13mA Loop buck: ≤100mV Locking voltage battery: 13.8V (12V system)/27.6V (24V system) Battery undervoltage protection: 10.6 V (12 V system)/21.2 V (24 V system) Battery undervoltage recovery voltage: 12.6 V (12 V system)/25.2 V (24 V system) Temperature compensation: -4mV/cell/°C Temperature probe: NTC 100K thermostat Maximum no-load voltage of solar panels: 18V-24V(12V system), 36V-48V(24V system) Mounting wire: 6AWG/12mm2 Working Temperature: -10~60°C Storage Temperature:-30~70°C Humidity requirement: ≤90%RH, no condensation Size:187*97*61mm/7.4*3.8*2.4in Package List: 1 * Solar Charging Controller 1 * Connector 1 * User Manual Small note: Due to the difference between monitor and light effects, the pictures may not reflect the actual color of the item. Please allow slight error due to manual measurement. Please note that the new type and old type of this product will be shipped randomly, and please make sure you do not mind before ordering. Package List